Taillon said no officers were wounded after multiple inmate fights broke out at 7:15 p.m. Sunday. He said 17 of the injured required medical attention outside the prison.

The South Carolina Department of Corrections tweeted that it involved multiple inmate-on-inmate altercations in three housing units.

Lee County Fire/Rescue said ambulances from multiple jurisdictions lined up outside to tend to the wounded. The local coroner’s office also responded.

The maximum-security facility in Bishopville houses about 1,500 inmates, some of South Carolina’s most violent and longest-serving offenders. Two officers were stabbed there in a 2015 fight. One inmate killed another in February.

These deaths at Lee are the most in any South Carolina prison in recent years. Four inmates were killed by a pair of prisoners in the state’s Kirkland Correctional Institution last year.